EP 1642865 A1 20060405 - NANO-FIBER OR NANO-TUBE COMPRISING V GROUP TRANSITION METAL DICHALCOGENIDE CRYSTALS, AND METHOD FOR PREPARATION THEREOF
Title (en)
NANO-FIBER OR NANO-TUBE COMPRISING V GROUP TRANSITION METAL DICHALCOGENIDE CRYSTALS, AND METHOD FOR PREPARATION THEREOF
Title (de)
NANOFASER ODER NANORÖHRE AUS KRISTALLEN VON DICHALKOGENIDEN VON ÜBERGANGSMETALLEN DER GRUPPE V UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
NANOFIBRE OU NANOTUBE COMPORTANT DES CRISTAUX D'UN DICHALCOGENURE DE METAL DE TRANSITION DE GROUPE V ET PROCEDE DE REALISATION ASSOCIE
Publication
Application
Priority
- JP 2004004559 W 20040330
- JP 2003156227 A 20030602
Abstract (en)
The present invention provides a nanostructure made of V group transition metal dichalcogenide such as NbSe 2 and a method for preparing such a nanostructure. A nanofiber and nanotube comprising crystals of V group transition metal dichalcogenide such as NbSe 2 or TaS 2 have electric properties identical to those of a bulk single crystal. The preparation method is as follows: high-purity Nb and Se which are starting materials and which are mixed in a stoichiometric ratio are allowed to react with each other at 800°C or less in a vacuum with a temperature gradient of 1 k/cm. In a method for preparing nanofibers or nanotubes from NbSe 2 that is a starting material by a chemical transport process using a iodine acting as a medium, if C 60 acting as a promoter is used, nuclei for forming the nanofibers or the nanotubes can be efficiently produced. Initial nanoparticles surrounding a C 60 molecule form nanorings, which grow into the nanotubes. Other nanoparticles surrounding no C 60 molecule grow into the nanofibers. The nanofibers prepared as described above have a diameter of 150 nm and a length of 10 µm.
IPC 1-7
IPC 8 full level
C01B 19/00 (2006.01); C01B 19/04 (2006.01); C01G 1/12 (2006.01); C01G 15/00 (2006.01); C30B 25/00 (2006.01); C30B 29/66 (2006.01); D01F 9/08 (2006.01)
CPC (source: EP KR US)
B82B 1/00 (2013.01 - KR); B82Y 30/00 (2013.01 - EP US); C01B 19/007 (2013.01 - EP US); C01B 19/04 (2013.01 - KR); C30B 25/005 (2013.01 - EP US); C30B 29/46 (2013.01 - EP US); B82Y 40/00 (2013.01 - KR); C01P 2004/16 (2013.01 - EP US); C01P 2006/40 (2013.01 - EP US)
Citation (search report)
See references of WO 2004108593A1
Designated contracting state (EPC)
DE FI NL
DOCDB simple family (publication)
EP 1642865 A1 20060405; CN 100351169 C 20071128; CN 1787965 A 20060614; JP 2004359471 A 20041224; JP 4125638 B2 20080730; KR 20060013510 A 20060210; US 2007183964 A1 20070809; WO 2004108593 A1 20041216
DOCDB simple family (application)
EP 04724430 A 20040330; CN 200480013185 A 20040330; JP 2003156227 A 20030602; JP 2004004559 W 20040330; KR 20057019952 A 20051020; US 55868204 A 20040330